Widest Track Tire on C5Z OEM rears
09-19-2010, 08:27 PM
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Widest Track Tire on C5Z OEM rears
Im struggling to find some scrubs in sizes Ive run in the past. Typically I run either 305s square or 280 front and 305 rear on C5Z rears.
305 hoosier full slicks dont bulge one bit. Worst case scenario that I cant find those sizes, has anyone run wider?
305 hoosier full slicks dont bulge one bit. Worst case scenario that I cant find those sizes, has anyone run wider?
09-20-2010, 07:08 AM
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Thanks all for the responses. I knew 315s were OK. A friend of mine runs those on OEM C5Z rears as well. Just wondered if anyone really pushed the limit.
Sure, can you PM me details as far as usage, type, cost, etc? The last scrubs I bought (Grand Am full slicks from another source) were complete pieces of garbage. In fact, when I FIRST got them, they were worse then the last set I threw away. 
Are the rest of you buying them new? Whats a good source?
Are the rest of you buying them new? Whats a good source?
Last edited by m3to335; 09-20-2010 at 07:26 AM.
09-20-2010, 07:51 AM
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Too much air in these tires is also a no-no. Your target hot pressures are in the 32-33 PSI range. If you over inflate you will crown the contact patch; this too will make you hate the tires.
Hoosiers are a good choice as well. They require less heat, are less pressure sensitive, and give more warning before they let loose. The Pirelli's are almost silent, even past their limit.
Last edited by kmagvette; 09-20-2010 at 08:03 AM.
09-20-2010, 11:32 AM
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Widest or Wildest? One of the best setups I ever ran on stock rears, all four corners, is the Mazda setup for Rolex GT. 285/645 Front and 305/660 rear. The tires (Pirelli PZero slicks) stick like glue if you are fast enough to get some heat into them. If you can't get heat into them, you will hate these tires. If you can, well, they are a full 2 seconds/lap faster than 315 Hoosier R6's on all four corners.
Too much air in these tires is also a no-no. Your target hot pressures are in the 32-33 PSI range. If you over inflate you will crown the contact patch; this too will make you hate the tires.
Hoosiers are a good choice as well. They require less heat, are less pressure sensitive, and give more warning before they let loose. The Pirelli's are almost silent, even past their limit.
Too much air in these tires is also a no-no. Your target hot pressures are in the 32-33 PSI range. If you over inflate you will crown the contact patch; this too will make you hate the tires.
Hoosiers are a good choice as well. They require less heat, are less pressure sensitive, and give more warning before they let loose. The Pirelli's are almost silent, even past their limit.
So, as far as longevity is concerned, how do these compare to the R6s? Also, the ones I am looking at are "D2" compound. Is that the same as what your talking about?
Lastly, where do you start cold? Ive been starting the Hoosiers in the very low 20's for the rear and mid 20's in the front. Seems to work great.
Last edited by m3to335; 09-20-2010 at 11:34 AM.
